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Author: PatAltimore

articles/iot-edge/troubleshoot-common-errors.md

@@ -371,11 +371,11 @@ The message queue isn't being cleaned up after messages are processed. The messa
 
 #### Cause
 
-The message cleanup interval is controlled by the client message TTL (time to live) and the *EdgeHub* *MessageCleanupIntervalSecs* environment variable. The default message TTL value is two hours and the default *MessageCleanupIntervalSecs* value is 30 minutes. If your client application uses a TTL value that is short, expired messages won't be cleaned up until the next cleanup interval.
+The message cleanup interval is controlled by the client message TTL (time to live) and the *EdgeHub* *MessageCleanupIntervalSecs* environment variable. The default message TTL value is two hours and the default *MessageCleanupIntervalSecs* value is 30 minutes. If your application uses a TTL value that is shorter than the default and you don't adjust the *MessageCleanupIntervalSecs* value, expired messages won't be cleaned up until the next cleanup interval.
 
 #### Solution
 
-The *MessageCleanupIntervalSecs* value should be significantly smaller than the smallest TTL value that the client is using. For example, if the client application defines a TTL of five minutes in the message header, set the *MessageCleanupIntervalSecs* value to one minute. These settings ensure that messages are cleaned up within six (5 + 1) minutes. 
+If you change the TTL value for your application that is shorter than the default, also adjust the *MessageCleanupIntervalSecs* value. The *MessageCleanupIntervalSecs* value should be significantly smaller than the smallest TTL value that the client is using. For example, if the client application defines a TTL of five minutes in the message header, set the *MessageCleanupIntervalSecs* value to one minute. These settings ensure that messages are cleaned up within six (5 + 1) minutes. 
 
 To configure the *MessageCleanupIntervalSecs* value, set the environment variable in the deployment manifest for the IoT Edge hub module. For more information about setting runtime environment variables, see [Edge Agent and Edge Hub Environment Variables](https://github.com/Azure/iotedge/blob/main/doc/EnvironmentVariables.md).